I am getting ready to start colistin for the first time and wondered how much sterile water you mix with the powdered colistin in the vial?I received my colistin, syringes & sterile water, and it said "use as directed" on all containers, but didn't "direct" me on how much to mix, etc.I thought if a couple of people could let me know how much they use, I would have an idea. (any suggestions for reducing foaming, etc would be appreciated too)My CF doctor only has a few patients on coly and I'm thinking they use saline rather than sterile water.Thanks a bunch! <img src="i/expressions/face-icon-small-smile.gif" border="0">