Additional file 1: of Chinese herbal medicine Tangshen Formula treatment of patients with type 2 diabetic kidney disease with macroalbuminuria: study protocol for a randomized controlled trial YanMeihua WenYumin YangLiping WuXi’ai LuXiaoguang ZhangBingxuan HuangWeiping LiPing 2016 SPIRIT checklist. (DOC 121 kb)