The two together is not uncommon as
codeine is not a very strong opiate and that's probably why they the child the
oxycodone..02 mcg\ml is a very small amount.1 microgram(mcg) per milli litre(ml) = 1000th of a gram per every one-hundreth of a litre of urine.Does that help you at all.I'm very sorry the child pass away.....Dave