HTR1A and sudden infant death syndrome: We approached the analysis of 5-HT1A receptor binding in the demise cohort of the SPS in a series of steps, examining in order: 1) the developmental profile of controls spanning postconceptional age from mid-gestation to the end of the first postnatal year; 2) the main effects of diagnosis and interactions (age-effects) compared between the SIDS cases vs. age-related control infants (PostKCOD; see definitions above), and 3) a comparison of preterm SIDS cases vs. preterm controls and separately, term SIDS vs. term controls.