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‘Wellcome’ Insulin : made with pure crystalline insulin : ‘Wellcome’ Protamine Insulin (with Zinc)

 'Wellcome' Insulin : made with pure crystalline insulin : 'Wellcome' Protamine Insulin (with Zinc) - suspension. Wellcome Collection.
 ‘Wellcome’ Insulin : made with pure crystalline insulin : ‘Wellcome’ Protamine Insulin (with Zinc) – suspension. Wellcome Collection

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