Melatonin and the cardiovascular system in animals: systematic review and meta-analysis - Veiga, Eduardo Carvalho de Arruda; Simões, Ricardo dos Santos; Caviola, Leonardo L.; Abreu, Luiz Carlos de; Cavalli, Ricardo de Carvalho; Cipolla Neto, José; Baracat, Edmund Chada; Soares Júnior, José Maria (Clinics, 2021)