MUMBAI, March 29 -- Assistant professors hired on contract in civic-run teaching hospitals are up against an age-limit stipulation, which states that their contracts will not be renewed when they turn 40. As a result, more than 50 assistant professors of the 323 currently employed in Mumbai's four civic hospitals will become age-barred in the next three months. This would only exacerbate the shortage of doctors in civic hospitals as they also tend to patients full time....