1 Department of Rheumatology, Internal Medicine, Geriatrics and Clinical Immunology, Pomeranian Medical University in Szczecin, Szczecin, Zachodniopomorskie, Poland marcmilc@hotmail.com.
2 Department of Rheumatology, Internal Medicine, Geriatrics and Clinical Immunology, Pomeranian Medical University in Szczecin, Szczecin, Zachodniopomorskie, Poland.
3 Rheumatology, Martina Hansens Hospital, Bærum, Norway.