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Response to Martinez-Novack et al. Comments on Hynes et al. Prevalence of Marijuana Use among University Students in Bolivia, Colombia, Ecuador, and Peru. Int. J. Environ. Res. Public Health, 2015, 12, 5233-5240
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Comments on Hynes et al. Prevalence of Marijuana Use among University Students in Bolivia, Colombia, Ecuador and Peru. Int. J. Environ. Res. Public Health 2015, 12, 5233–5240

Facultad de Ciencias de la Salud, Escuela de Medicina, Universidad Peruana de Ciencias Aplicadas
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These authors contributed equally to this work.
Academic Editors: Paul B. Tchounwou, Jorge Delva and Shijian Li
Int. J. Environ. Res. Public Health 2015, 12(9), 11718-11720; https://doi.org/10.3390/ijerph120911718
Received: 16 July 2015 / Accepted: 1 September 2015 / Published: 17 September 2015
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). View Full-Text
Keywords: Cannabis; Latin America; epidemiology; prevalence proportion; participation rate Cannabis; Latin America; epidemiology; prevalence proportion; participation rate
MDPI and ACS Style

Martinez-Novack, M.C.; Ortiz-Ortiz, M.T.; Castañeda-Carbajal, B.; Alvarado, G.F. Comments on Hynes et al. Prevalence of Marijuana Use among University Students in Bolivia, Colombia, Ecuador and Peru. Int. J. Environ. Res. Public Health 2015, 12, 5233–5240. Int. J. Environ. Res. Public Health 2015, 12, 11718-11720.

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