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Comparison of methodological quality of positive versus negative comparative studies published in Indian medical journals: a systematic review |
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| | Jaykaran Charan,Mayur Chaudhari,Ryan Jackson,Rahul Mhaskar,Tea Reljic,Ambuj Kumar | | | BMJ Open. 2015; 5(6): e007853 | | | [Pubmed] [Google Scholar] [DOI] | | | 2 |
How to calculate sample size for different study designs in medical research? |
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| | Charan, J. and Biswas, T. | | | Indian Journal of Psychological Medicine. 2013; 35(2): 121-126 | | | [Pubmed] [Google Scholar] | |
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