Opium and bladder cancer: A systematic review and meta-analysis of the odds ratios for opium use and the risk of bladder cancer

• Mahdi Afshari,

  Affiliation Department of Community Medicine, Zabol University of Medical Sciences, Zabol, Iran

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• Ghasem Janbabaei,

  Affiliation Gastrointestinal Cancer Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran

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• Mohammad Amin Bahrami,

  Affiliation Healthcare Management Department, Shahid Sadoughi University of Medical Sciences, Yazd, Iran

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• Mahmood Moosazadeh

  * E-mail: mmoosazadeh1351@gmail.com

  Affiliation Health Sciences Research Center, Addiction Institute, Mazandaran University of Medical Sciences, Sari, Iran

  http://orcid.org/0000-0002-5452-514X

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