The official caption:
Liaqat Ali lifts his shirt to show scars from an operation after he sold one of his kidneys for around $1,800, in the village of Mateela, Pakistan, August 13, 2003. Pakistan is fast becoming a hotbed for trade in live kidneys, with hundreds of transplant operations taking place every year.
Note that I think they are saying this picture was taken on August 13, not that the operation took place on August 13.