Sequential occurrence of microscopic polyangiitis and anti-glomerular basement membrane disease in a patient with small cell lung cancer: a case report. - Hayashi, Yusuke; Katayama, Yuko; Sakuragi, Minoru; Hayashi, Ayano; Kakita, Hiroko; Uyama, Michihiro; Marumo, Satoshi; Fukui, Motonari (Journal of Medical Case Reports, 2021)