?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Hawa%2C+Nigar+Sultana&rft.aufirst=Nigar+Sultana&rft.aulast=Hawa&rft.degree=Doctoral&rft.title=Regulation+of+parathyroid+hormone+gene+expression+by+calcium+and+1%2C25-dihydroxyvitamin+D3&rft.inst=UCL+(University+College+London)&rft.tpages=297&rft.date=1994