1 Subjects: “...hydroxychloroquine...”

2 Subjects: “...hydroxychloroquine...”

3 Subjects: “...hydroxychloroquine...”

4 Subjects: “...hydroxychloroquine...”

5 Subjects: “...hydroxychloroquine...”

6 Subjects: “...hydroxychloroquine...”

7 “..., many new data have confirmed the effectiveness of "old" drugs, such as hydroxychloroquine, methotrexate...”