Comments on Hynes et al. Prevalence of Marijuana Use among University Students in Bolivia, Colombia, Ecuador and Peru

We have read and analyzed the article entitled “Prevalence of marijuana use among university students in Bolivia, Colombia, Ecuador and Peru”. We propose some objective points which could enhance the internal validity of the study (i.e., we suggest to report participation proportions).

Author(s): Martinez Novack, Maria Claudia; Ortiz Ortiz, Maria Teresa; Castañeda-Carbajal, Bruno; Alvarado, German F.
Source: International Journal of Environmental Research and Public Health (Int. J. Environ. Res. Public Health)

URL: http://hdl.handle.net/10757/579608