Affiliation: | aOutpatient Clinic for Sleep Disturbed Infants, Landspitali—University Hospital, IS-101 Reykjavik, Iceland bFaculty of Nursing, University of Iceland, Eirberg, Eiriksgata 34, IS-101 Reykjavik, Iceland cInstitute of Nursing Research, University of Iceland, IS-101 Reykjavik, Iceland |