| Affiliation: | 1. Department of Hygiene and Ecomedicine, Faculty of Public Health, Medical University of Plovdiv, Plovdiv, Bulgaria;2. Medical College, Medical University of Plovdiv, Plovdiv, Bulgaria;3. Department of Management, Faculty of Economics and Management, University of Agribusiness and Rural Development, Plovdiv, Bulgaria;4. Institute for Occupational, Social, and Environmental Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany;5. Institute of Epidemiology I, Helmholtz Zentrum München – German Research Center for Environmental Health, Neuherberg, Germany;6. Department of Health Management and Healthcare Economics, Faculty of Public Health, Medical University of Plovdiv, Plovdiv, Bulgaria;1. Apex Level Standards and Industrial Metrology Division, CSIR-National Physical Laboratory, New Delhi 110012, India;2. Department of Mechanical, Production and Industrial Engineering, Delhi Technological University, Delhi 110042, India |
