Community Pharmacy Wales chief executive Russell Goodway said pharmacies are best placed to help as an estimated 50, 000 people a day visit a local chemist.

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"Our reason for being is to protect affordable and broad access to pharmaceuticals, " says Robert Seidman , Wellpoint's chief pharmacy officer.

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"As reluctant as many pharmacists and consumers are to take the extra time, it is worth one last extra check to make sure nothing will go wrong, " says Michael Negrete, chief executive of the Pharmacy Foundation of California.

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