Neurosurgeons Alison Wray (L) and Wirginia Maixner (C), and anaesthetist Andrew Greensmith operate on newly separated twins Trishna and Krishna of Bangladesh in the surgery at the Royal Children's Hospital in Melbourne in this handout picture taken on November 17, 2009 and made available November 19, 2009. Twenty seven hours of surgery were required to separate the conjoined twins, who were joined at the head. Picture taken November 17, 2009. REUTERS/Royal Children's Hospital Melbourne/Robert Reitmaier/Handout (AUSTRALIA HEALTH SOCIETY) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS
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