title: A Diffuse Progressive Bluish Pigmentation of the Trunk in a White Woman: Challenge.
authors.affiliation: Dermatology Clinic, AOU of Cagliari, Cagliari, Italy.
authors.forename: Anna L
authors.initials: AL
authors.lastname: Pinna
authors.affiliation: Dermatology Clinic, AOU of Cagliari, Cagliari, Italy.
authors.forename: Caterina
authors.initials: C
authors.lastname: Ferreli
authors.affiliation: Dermatology Clinic, AOU of Cagliari, Cagliari, Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Atzori
authors.affiliation: Department of Medical Science and Public Health University of Cagliari, Cagliari, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Pilloni
authors.affiliation: Dermatology Clinic, AOU of Cagliari, Cagliari, Italy.
authors.forename: Franco
authors.initials: F
authors.lastname: Rongioletti