http://www.nlm.nih.gov/databases/alerts/sickle_cell.html
Hydroxyurea has_been_used primarily to treat myeloproliferative_disorders such_as polycythemia_vera.
which up until this trial had primarily been_used to treat myeloproliferative_disorders such_as polycythemia_vera
as_long_as the patient continues to take the prescribed dose. Hydroxyurea is_used for treatment of polycythemia_vera,
a disease in which too many red_blood_cells are_produced. In an open label study of polycythemia_vera now entering its 15th year,