Nyob rau xyoo 1990, Swiss kws kho mob tau pom tias platelets tuaj yeem tsim ntau yam kev loj hlob ntawm qhov siab, uas tuaj yeem kho cov ntaub so ntswg sai thiab zoo.Tom qab ntawd, PRP tau siv ntau yam kev phais sab hauv thiab sab nraud, phais yas, hloov daim tawv nqaij, thiab lwm yam ....
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