title: Hybrid polynomial and periodic regression with and without missing observations.
mesh_terms: D000704:Analysis of Variance; D001699:Biometry; D004812:Epidemiologic Methods; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008954:Models, Biological; D009026:Mortality; D012044:Regression Analysis; D012140:Respiratory Tract Diseases / Q000401:mortality; D014481:United States