Biomarkers for assessing pain and pain relief in the neonatal intensive care unit oleh Judith A. ten Barge, Mathilde Baudat, Mathilde Baudat, Naomi J. Meesters, Alida Kindt, Elbert A. Joosten, Elbert A. Joosten, Irwin K.M. Reiss, Sinno H.P. Simons, Gerbrich E. van den Bosch