Why don’t scientists know if pica is a cause or a cure and how much scientific research has been put in to pica?

Why don’t scientists know if pica is a cause or a cure and how much scientific research has been put in to pica?

Posted on June 20, 2013 by in Question. Comments Off on Why don’t scientists know if pica is a cause or a cure and how much scientific research has been put in to pica?