Individuals with known history of glucose 6 phosphate deficiency are excluded from the trial (possible issue with HCQ tolerance) Phosphate =< 1.1 x ULN Known selenium deficiency History of glucose-6-phosphate dehydrogenase deficiency Patient has Glucose-6-phosphate deficiency Patients with documented glucose-6-phosphate dehydrogenase deficiency Must not have known glucose-6-phosphate dehydrogenase (G-6PD) deficiency History of glucose-6-phosphate dehydrogenase deficiency Patients must not have known or suspected glucose-6-phosphatase (G-6P) deficiency Pernicious anemia or other anemias due to vitamin B12 deficiency (due to potential masking of deficiency with leucovorin) Patients with known glucose-6-phosphate dehydrogenase deficiency Patients with known glucose-6-phosphate deficiency, psoriasis, porphyria and psychosis Known glucose-6-phosphate dehydrogenase (G-6PD) deficiency Known glucose-6-phosphate dehydrogenase (G-6PDH) deficiency Subjects with known glucose 6 phosphate dehydrogenase deficiency. History of known Glucose-6-Phosphate Dehydrogenase (G-6-PD) deficiency. Known glucose-6-phosphate (G-6-P) deficiency Known or documented bleeding disorders not limited to: anti-phospholipid syndrome, homozygotes for Factor V Leiden deficiency, antithrombin III deficiency, protein C deficiency, protein S deficiency, hyperhomocysteinemia, systemic lupus erythematous, or prothrombin G2020 gene mutation History of B12 deficiency