title: Reply to letter: Exogenous melatonin for Parkinson's disease: 'Waking up' to the need for further trials.
authors.affiliation: Laboratory of Clinical Pharmacology and Therapeutics, Faculty of Medicine, University of Lisbon, Portugal; Institute of Pharmacology and Neurosciences, Faculty of Medicine, University of Lisbon, Portugal; Unit of Neurosciences, Instituto de Medicina Molecular, Lisbon, Portugal.
authors.forename: Tiago Martins
authors.initials: TM
authors.lastname: Rodrigues
authors.affiliation: Department of Neurosciences, Hospital de Santa Maria, Lisbon, Portugal.
authors.forename: Ana
authors.initials: A
authors.lastname: Castro Caldas
authors.affiliation: Laboratory of Clinical Pharmacology and Therapeutics, Faculty of Medicine, University of Lisbon, Portugal; Department of Neurosciences, Hospital de Santa Maria, Lisbon, Portugal; Clinical Pharmacology Unit, Instituto de Medicina Molecular, Faculty of Medicine, University of Lisbon, Portugal. Electronic address: joaquimjferreira@gmail.com.
authors.forename: Joaquim J
authors.initials: JJ
authors.lastname: Ferreira
mesh_terms: D006801:Humans; D008550:Melatonin; D010300:Parkinson Disease; D012893:Sleep Wake Disorders; D014851:Wakefulness
chemical_list: D008550:Melatonin
keywords: Daytime somnolence; Nocturnal sleep problems; Parkinson’s disease; Pharmacological interventions; Systematic review