Nicotine metabolite ratio: Comparison of the three urinary versions to the plasma version and nicotine clearance in three clinical studies

Haidy Giratallah, Meghan J. Chenoweth, Newton Addo, Jasjit S. Ahluwalia, Lisa Sanderson Cox, Caryn Lerman, Tony P. George, Neal L. Benowitz, Rachel F. Tyndale