Once article about original research can not be plagiat or autoplagiat from the author! Then all article about Penicilin are plagiats of A. Fleming work, all copies of music and literature of famous componist and writer are PLAGIAT!?
For meta analises are not the problems the simmilar articles, than the not original, constructed, virtual research articles without control studies! The problem is not in form, in text, than in falsificate of many research without real research, sample, data….!