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Testosterone in crystalline form (light microscopy). ©Lennart Nilsson/SPL -
Estrogen in crystalline form (light microscopy). ©Lennart Nilsson/SPL -
Insulin in crystalline form. (Light microskopy) ©Lennart Nilsson/SPL -
Progesterone in crystalline form. Lennart Nilsson/SPL
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Testosterone in crystalline form (light microscopy). ©Lennart Nilsson/SPL -
Estrogen in crystalline form (light microscopy). ©Lennart Nilsson/SPL -
Insulin in crystalline form. (Light microskopy) ©Lennart Nilsson/SPL -
Progesterone in crystalline form. Lennart Nilsson/SPL
Look at the images in Life Magazine 23 april 1971