MUMBAI, Jan. 28 -- On Friday evening as the city sparkled to mark India's 75th Republic Day, in Lower Parel some of the most eminent doctors and medical practitioners of their generation - all in the late 60s and 70s, and in the prime of their careers -- gamely donned wigs, gowns, hats and capes to perform to a medley of rousing pop and Bollywood hits in a musical titled 'Yesterday Once More.'...