GlaxoSmithKline plc (LSE/NYSE:GSK) has announced that China’s National Medical Products Administration (NMPA) has approved Benlysta (belimumab) for the treatment of adult patients with active lupus nephritis (LN), a type of kidney disease affecting more than half of those with systemic lupus erythematosus (SLE). Benlysta is the only biologic approved to treat SLE and lupus nephritis…