Which major pharmacy chain was the first to introduce the concept of self-service retail in the pharmaceutical industry, fundamentally changing how medications were sold to consumers?

The pharmaceutical retail landscape has transformed dramatically over the past century. Today's pharmacy chains offer everything from prescription medications to health consultations, but their origin stories reveal fascinating insights about healthcare evolution. This trivia question explores a pivotal moment in pharmaceutical retail history that changed how patients access medicine.

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Walgreens, with its 1952 'serve yourself' model that transformed pharmacies from behind-counter service to open shelf access for non-prescription items
CVS (originally Consumer Value Stores), which pioneered the health-and-beauty focused retail pharmacy model in 1963
Boots (UK), which introduced the first 'accessible medicine' retail concept in 1949 following the creation of the NHS
Rite Aid, which developed the first integrated prescription-to-retail floor plan in 1968 to increase consumer convenience