Being a mother of preterm multiples in the context of socioeconomic disadvantage: perceived stress and psychological symptoms - Baptista, J.; Moutinho, V.; Mateus, V.; Guimarães, H.; Clemente, F.; Almeida, S.; Andrade, M. A.; Dias, C. P.; Freitas, A.; Martins, C.; Soares, I. (Jornal de Pediatria, 2018)