(1) zaɓin kayan aiki.Akwai wasu matsaloli a cikin zaɓin kayan aikin harhada magunguna, kamar zaɓi ta hanyar gwaninta (ba tare da ƙididdigewa na gaske ba, ko ƙarancin lissafin bayanai), makauniyar neman ci gaba, da rashin isasshen bincike na bayanan zahiri, waɗanda ke yin tasiri sosai…
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