Describes dataset ("mnds", "asp", "fu1", etc.)

Describes which registry patient belongs to:
MNDS - minimal neonatal dataset (all infants < 32 weeks gestational age or <1501g birth weight)
B34 - dataset of all infants 32 0/7 weeks to 33 6/7 weeks gestation (excluding infants born <1501g birth weight - see MNDS)
ASP - all infants with hypoxic ischemic encephalopathy
OS1 - all infants with severe congenital heart disease, HLM OP < 6 weeks of life, HLHS with Hybrid procedure. OS2 - all infants with severe congenital heart disease, HLM OP < 6 weeks of life, HLHS with Hybrid procedure. OS3 - all infants with severe congenital heart disease, HLM OP < 6 weeks of life, HLHS with Hybrid procedure. FU1 - Follow-Up after 1 year FU2 - Follow-Up after 2 years FU5 - Follow-Up after 5 years SDQ - Strength and Difficulties Questionnaire FUP - Parental questionnaire