Which major medical/pharmaceutical company's current logo evolved from a symbol that originally represented the ancient Roman god of medicine?

The healthcare and pharmaceutical industries have some of the most recognizable brands in the world, but their visual identities often have fascinating histories that few people know about. This trivia question explores how one major medical brand's logo has evolved and what it originally represented. Test your knowledge of medical brand history!

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Johnson & Johnson, whose red cross symbol was adapted from the caduceus staff of Mercury
Pfizer, whose blue oval logo evolved from a depiction of the Rod of Asclepius
Merck, whose green angular logo was derived from the laurel wreath of Apollo
GlaxoSmithKline (GSK), whose orange logo evolved from a stylized representation of the god Aesculapius