HomocystinuriaCystathionine beta-SynthaseEctopia LentisHomocystineCystathioninePyridoxineHomocysteineBetaineMetabolism, Inborn ErrorsAmino Acid Metabolism, Inborn ErrorsAnemia, MegaloblasticMarfan SyndromeMethionineHydro-LyasesRenal AminoaciduriasLivedo Reticularis5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseVitamin B 12Neonatal ScreeningMethylmalonic Acid