title: RETRACTED: Calcium versus oral contraceptive pills containing drospirenone for the treatment of mild to moderate premenstrual syndrome: a double blind randomized placebo controlled trial.
abstract: This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy).
  This article has been retracted at the request of the Editorial Board for the following reason: This single-author publication which reports the conducting of a large 3-arm randomised controlled trial, with no missing data from 210 recruited patients, has been questioned as implausible. The authors have been unable to provide supporting documents to provide an explanation.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, Beni-Suef University, Egypt.
authors.forename: Nesreen A A
authors.initials: NAA
authors.lastname: Shehata
mesh_terms: D000328:Adult; D000736:Androstenes / Q000627:therapeutic use*; D002118:Calcium / Q000627:therapeutic use*; D003277:Contraceptives, Oral, Combined / Q000627:therapeutic use*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D011293:Premenstrual Syndrome / Q000175:diagnosis / Q000188:drug therapy*; D012720:Severity of Illness Index; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D000736:Androstenes; D003277:Contraceptives, Oral, Combined; C035144:drospirenone; D002118:Calcium
keywords: Calcium supplements; Drospirenone; Oral contraceptive pills; PMS treatment; Premenstrual syndrome