1. Department of Family Medicine, Riga Stradins University, Riga, Latvia;
2. Department of Learning, Informatics, Management and Ethics, Karolinska Institutet, Solna, Sweden;
3. Statistics Unit, Riga Stradins University, Riga, Latvia;
4. Department of Human Physiology and Biochemistry, Riga Stradins University, Riga, Latvia;
5. Department of Internal Diseases, Riga Stradins University, Riga, Latvia