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Why a blood test taken from your ring finger?
So the least painful and least dangerous 
Pads available, have no hairline, rich vessels, they are easy to decontaminate and, if necessary, and squeeze. The skin on the ring finger is thinner than on the thumb, index and average, and has less nerve endings, including pain receptors. Littlefinger also closely associated with the wrist, so when the infection in the wound on the little finger of the inflammation may spread to the bend of the brush.
Source: www.vokrugsveta.ru/quiz/790/
Pads available, have no hairline, rich vessels, they are easy to decontaminate and, if necessary, and squeeze. The skin on the ring finger is thinner than on the thumb, index and average, and has less nerve endings, including pain receptors. Littlefinger also closely associated with the wrist, so when the infection in the wound on the little finger of the inflammation may spread to the bend of the brush.
Source: www.vokrugsveta.ru/quiz/790/
