Assessment of thiopurine methyltransferase activity in patients prescribed azathioprine or other thiopurine-based drugs.

Ronald A. Booth, Mohammed T. Ansari, Andrea C. Tricco, Evelin Loit, Laura Weeks, Steve Doucette, Becky Skidmore, Jeffrey S. Hoch, Sophia Tsouros, Margaret Sears, Richmond Sy, Jacob Karsh, Suja Mani, James Galipeau, Alexander Yurkiewich, Raymond Daniel, Alexander Tsertsvadze, Fatemeh Yazdi