<qa>  What is the name of the drug that can cause membranous nephropathyPatients 13 years of age or older with idiopathic membranous nephropathy or lupus membranous nephropathy may be eligible for this study. Candidates must have completed at least one month of treatment with a stable dose of angiotensin converting enzyme ACE inhibitors or angiotensin receptor blockers ARBs. They will be screened with a medical history, physical examination, blood tests, skin test for exposure to tuberculosis, and an examination for infection, cancers, and other conditions that can cause membranous nephropathy. 