Parsing long MEDLINE string with multiple affiliation

[Titipat Achakulvisut]

Sometimes, we have long string like the following. The parse_affil should detect multiple affiliations and return list of parsed result

Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado, USA 
Institute of Hypertension and Kidney Research, Zhongshan School of Medicine, Sun Yat-sen University, China . 
Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado, USA. 
Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado, USA. 
Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado, USA. 
Institute of Hypertension and Kidney Research, Zhongshan School of Medicine, Sun Yat-sen University, China. 
Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado, USA. Kidney Disease Section, NIDDK, NIH, USA. 
Department of Medicine, Division of Renal Diseases and Hypertension, University of Colorado, USA.