Pessary or progesterone to prevent preterm birth in women with short cervical length: protocol of the 4-6 year follow-up of a randomised controlled trial (Quadruple-P).
Emilie V J van Limburg StirumLarissa I van der WindtCharlotte E van DijkAnneloes L van BaarAleid G LeemhuisMadelon van WelyMarjon A de BoerJanneke van 't HooftMartijn A OudijkEva Pajkrtnull nullPublished in: BMJ open (2022)
Dutch Trial Register (NL9646).