Response to the letter entitled "Obstructive sleep apnea, excessive daytime sleepiness, and adherence to antihypertensive treatment: Questionnaire survey". Issue 12 (20th August 2017) - Righi, Camila Gosenheimer; Martinez, Denis; Gonçalves, Sandro Cadaval; Gus, Miguel; Moreira, Leila Beltrami; Fuchs, Sandra C.; Fuchs, Flavio Danni