Q J Med 2004; 97: 61
© Association of Physicians 2004; all rights reserved.
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Phung Hiep floating market, Mekong Delta, Vietnam
(For a list of lectures about this trip, visit www.pilk.net/lecturedates.html)
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Photographed by John Pilkington
From its source on the frozen Qinghai Plateau north of Tibet, the world's twelfth longest river passes through six countries before finally splitting