Professional-grade, global skincare brand Dermalogica has partnered with long-time brand fan Courteney Cox after years of building a relationship.    Cox was first introduced to Dermalogica on the set of 1990s sitcome “Friends,” where keen-eyed fans can spot a large Dermalogica bottle in Monica’s bathroom across several episodes.    As a brand founded on skin health and upskilling professional skin therapists for 40 years, Cox aims to shine a light on the original “skinfluencers”...