The PARTNER program aims to make investigators enthusastic for clinical and basic research in Psoriasis Arthritis (PsA) and to build a research network in PsA. The program offers excellent teaching in research in PsA. The Fellowship will be granted to allow a one year stay in one of the five host institution to accomplish a research project thematically orientated to PsA. All host centers participating in the PARTNER fellowship program are dedicated to high-quality research and education in PsA.