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The reason why the establishment of CWH leads to the closure of other pharmacies in a given town or city, is that pharmacists were never educated in the ways of innovation or local area marketing. Marketeers were.
The pharmacy degree taught me the stuff of Boyles Law, the Krebs Cycle and the mechanism of action of Dihydrofolate Reductase Inhibitors - all very interesting but ultimately useless for running a business.
Beyond "Location, Location, Location" these educators were lax, and figured establishing a pharmacy was a licence to