An HILIC-MS/MS method to determine underivatized amino acids and neurotransmitters in human plasma samples to elucidate schizophrenia - Domingues, Diego S.; Crevelin, Eduardo José; Moraes, Luiz Alberto Beraldo de; Queiroz, Maria Eugênia Costa (International Symposium on Advances in Extraction Technologies (EXTECH), 2013)