H1: hydroxychloroquine 400 mg/12 h (day 1) + 200 mg/12 h (day 2 to 5) (regimen 1); H2: hydroxychloroquine 400 mg/12 h (day 1) + 200 mg/8 h (day 2 to 5) (regimen 2); H3: hydroxychloroquine 400 mg/12 h (day 1) + 200 mg/12 h (day 2 to 7–10) (regimen 3); H4: hydroxychloroquine 400 mg/12 h (day 1) + 200 mg/8 h (day 2 to 7–10) (regimen 4); A: