Abdel RahimAMM Abd El AalDEFathallaMMF, et al. Effectiveness of hormonal intrauterine system in treatment of pelvic congestion syndrome compared to oral progestin. J Endometr Pelvic Pain Disord. Epub ahead of print 11 November 2025. DOI: 10.1177/22840265251387844.
2.
SchulzKFGrimesDA. Generation of allocation sequences in randomised trials: chance, not choice. Lancet2002; 359: 515-519.
3.
ConcatoJShahNHorwitzRI. Randomized, controlled trials, observational studies, and the hierarchy of research designs. N Engl J Med2000; 342: 1887-1892.
4.
VickersAJAltmanDG. Statistics notes: analysing controlled trials with baseline and follow up measurements. BMJ2001; 323: 1123-1124.