Treatment center questions Does the SNIP still exist? The SNIP (Netherlands Institute for Pigment Disorders section) dermatology clinic in the Amsterdam UMC still exists. This is where the (super) vitiligo specialists are. (kind of 3rd line) The Skin Medical Center is a collaboration between Amsterdam UMC (former AMC and VUmc) and Centrum Oosterwal. Patients are initially referred to HuidMC by their GP. If specific (more in-depth) research needs to be carried out, patients are certainly welcome in the SNIP.