Correspondence
Aspects related to the inference of causality in cross-sectional studies. Comments on: “8-Hydroxy-2’-deoxyguanosine protein immunoexpression is associated with the pathogenesis of actinic cheilitis”
Ivanka Miranda de Castro Martins, Anna Carolina Miola, Luiz Eduardo Fabrício de Melo Garbers, Hélio Amante Miot
Corresponding author
Department of Infectology, Dermatology, Imaging Diagnosis and Radiotherapy, Faculty of Medicine, Universidade Estadual Paulista, Botucatu, SP, Brazil
