%0 Journal Article %T The prevalence of A2 and A2B subgroups in blood donors at a tertiary care teaching hospital blood bank of Rayalaseema region: a pilot study %A I.S. Chaitanya Kumar %A A. Yashovardhan %A B. Suresh Babu %A Anju Verma %J Journal of Clinical and Scientific Research %D 2012 %I Sri Venkateswara Institute of Medical Sciences, Tirupati %U http://svimstpt.ap.nic.in/jcsr/janmar12_files/pdf%201-1-12/Correrspondence.pdf