?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Pitchappan%2C+R.M.&rft.aulast=Pitchappan&rft.aufirst=R.M.&rft.volume=221&rft.date=1997&rft.issn=0250-5991&rft.atitle=Major+histocompatibility+complex+restriction+in+tuberculosis+susceptibility&rft.title=Journal+of+biosciences&rft.pages=47-57&rft.genre=article