This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the Editorial Board for the following reason: This single-author publication which reports the conducting of a large 3-arm randomised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.
Trial registration: ClinicalTrials.gov NCT02089620.
Keywords: Calcium supplements; Drospirenone; Oral contraceptive pills; PMS treatment; Premenstrual syndrome.
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