00270nam a2200133Ia 4500020000900000082000800009100002500017245001800042250000600060260004800066300000800114500000800122650000600130  aNULL  a519  aLewis, Alvin Edward  0aBiostatistics  a-  aDelhibAffiliated East West Press Pvt. Ltd.  a227  a263  a-