1. Astellas Pharma Europe; Leiden The Netherlands
2. Kinesis Pharma BV; Breda The Netherlands
3. ARENSIA Exploratory Medicine; Republican Clinical Hospital; Chisinau Moldova
4. Medivation, Inc., (Medivation was acquired by Pfizer, Inc. in September 2016); San Francisco CA USA
5. Gastroenterology Clinic; University Hospital St. Ivan Rilski; Medical University Sofia; COMAC Medical Ltd; Sofia Bulgaria