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Prevalence of refractive errors in the European adult population: the Gutenberg Health Study (GHS)
Frozen cortical samples (the weights of which were determined beforehand) were homogenized in 5% 5-sulfosalicylic acid (SSA), and the mixtures were centrifuged at 8000 g for 10 min at 4 C
Full text: Kumar, P., Osahon, O., Vides, D
Only if your healthcare provider prescribes it and provides proper training
It was first written about in the first century BC in Chinas first herbal Encyclopedia, Shen Nongs Materia Medica , where it was listed as a superior herb
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