Cross-sectional survey for assessing cancer care providers’ characteristics and attitudes on smoking cessation in Colombia and Mexico oleh Sanjay Shete, Ernest Hawk, Luz Myriam Reynales-Shigematsu, Hector Garcia, Irene Tami-Maury, Laura Suchil, Leonor Garcia-Gomez, Mixing Chen, Alejandro Betancur, Paul M Cinciripini