An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.

Fotografia 1: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012. AFP PHOTO / DAVID GANNON
Fotografia 2: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 3: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 4: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 5: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 6: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 7: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 8: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 9: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 10: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 11: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 12: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 13: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 14: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 15: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 16: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 17: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 18: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 19: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 20: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 21: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 22: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 23: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 24: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 25: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 26: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 27: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 28: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 29: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 30: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 31: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 32: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 33: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 34: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 35: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 36: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 37: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 38: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 39: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 40: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 41: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 42: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 43: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 44: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 45: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 46: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 47: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 48: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.
Fotografia 49: An operation replacinging an artificial knee is photographed at the Hygiea Clinic in Berlin's Schoeneberg district on July 11, 2012.