| http://www.w3.org/ns/prov#value | - he invention also comprises an effective concentration of at least one other active substance selected from xanthines, vitamins, in particular vitamins A, B and E, tyrosine or its derivatives, for example glucose tyrosinate and malyltyrosine, quinine or its derivatives, rubefacients such as methyl nicotinate, a papilla fibroblast culture supernatant such as that described in the document EP-A-272
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