1. Hospital Pelópidas Silveira—IMIP, Recife, Brazil;
2. Department of Neurosurgery, Gainesville, Florida;
3. LIM-02 Department of Surgery, Hospital of Clinics, Universidade de São Paulo Medical School, São Paulo;
4. Neurosurgery, Hospital Israelita Albert Einstein, São Paulo; and
5. Microsurgery Lab, Hospital Beneficência Portuguesa, São Paulo, Brazil