Tami-Maury I, Vidrine DJ, Fletcher FE, Danysh H, Arduino R, Gritz ER. Poly-tobacco use among HIV-positive smokers: implications for smoking cessation efforts. Nicotine Tob Res. 2013 Dec;15(12):2100-6. doi: 10.1093/ntr/ntt107.
Whittington D, Sur D, Cook J, Chatterjee S, Maskery B, Lahiri M, Poulos C, Boral S, Nyamete A, Deen J, Ochiai L, Bhattacharya SK. Rethinking cholera and typhoid vaccination policies for the poor: private demand in Kolkata, India. World Dev. 2009 Feb 1;37(2):399-409.