| http://www.w3.org/ns/prov#value | - I worked in a hospital laboratory for almost 5 years.Hair testing just isnt done....its costly and unreliable.All this stuff you see on tv is just tv....I read the medical journals for labs...some are selling it but also state its not feesible.Urine testing is reliable and inexpensive and is used most places.Hair testing is not recommended by any lab except maybe the ones who want to sell it.Hair
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