Diagnosis and Treatment Process and Literature Review of a Patient with Variant Angina Pectoris without Coronary Artery Obstruction 
WANG Lida,QI Zhen,ZHU Ning,WANG Jiwen
Chinese General Practice . 2021, (5): 625 -629 .  DOI: 10.12114/j.issn.1007-9572.2020.00.508