Selmanowitz VJ
Acta Derm. Venereol. 1975;55(6):481-4
PMID: 55042
Ionically separated epidermal sheets from pigmentations of two patients with lentiginosis profusa were incubated in dopa (3,4 dihydroxyphenylalanine) and slide-mounted. Light microscopy revealed intracellular giant pigment granules which appeared like those seen with von Recklinghausen’s disease.
http://www.ncbi.nlm.nih.gov/pubmed/55042