Amr Ehab El-Qushayri’s Post

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| PLOS ONE Academic Editor | Medical Researcher

In the past two days I posted a question whether those two papers are duplicate or not: 1-OnabotulinumtoxinA for treatment of chronic migraine: Results from the double-blind, randomized, placebo-controlled phase of the PREEMPT 2 tria 2-OnabotulinumtoxinA for treatment of chronic migraine: Results from the double-blind, randomized, placebo-controlled phase of the PREEMPT 1 trial ==>Despite that both papers have ~ the same authors, treatment arms (dosage, timing,..etc) and recruitment period --- they are not considered duplicate population. When you go to their protocol published in clinicaltrials.gov, you will find that the trial location is different (attached screen shot) Note that the same trial could have two different registration numbers See https://lnkd.in/d2gi9SaD So you have to check every paper well before taking the exclusion decision especially when you have small number of included papers. #research #medicalresearch #publication #duplicate #systematicreview #metaanalysis #publichealth #editor

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Amr Ehab El-Qushayri

| PLOS ONE Academic Editor | Medical Researcher

6mo
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