Im doing GH for the first time,i was instructed to go to 15 on the pin which is almost 3 lines past the number 10,this is supposed to be 4iu of GH.Why is this like this and not just count the lines on the pin for the correct iu doseage?Does it matter if its 1/2 inch or 1 inch?I have been doing insulin and going to the number 10 and thinking its 10 iu of slin.

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