Caesarean section surgical techniques: 3 year follow-up of the CORONIS fractional, factorial, unmasked, randomised controlled trial за авторством CORONIS collaborative group, Abalos, E, Addo, V, Brocklehurst, P, El Sheikh, M, Farrell, B, Gray, S, Hardy, P, Juszczak, E, Mathews, J, Naz Masood, S, Oyarzun, E, Oyieke, J, Sharma, J, Spark, P