Eriksson, M., Lund, M., Msghina, M., Reingardt, M., Ullsten, A. (2026). Synchronous brain activity in newborn infants and their mothers during parent-led multimodal pain alleviation with skin-to-skin contact, breastfeeding and lullaby singing: Study protocol for a fNIRS hyperscanning study. PLoS ONE. https://doi.org/10.1371/journal.pone.0353856