1. King's College London; London UK
2. Department of Dermatology; The University of Alabama at Birmingham; Birmingham AL USA
3. Dermatology, Department of Experimental, Diagnostic and Specialty Medicine; University of Bologna; Bologna Italy
4. Department of Dermatology; University of Michigan; Ann Arbor MI USA
5. Hon. Pr. of the University of Franche-Comté; Nail Disease Centre; Cannes France