[1] Hlth Sci Univ Derince Training & Res Hosp, Dept Pain Med, Kocaeli, Turkey
[2] Sakarya Training & Res Hosp, Dept Phys Therapy & Rehabil, Sakarya, Turkey
[3] Samsun Univ, Samsun Training & Res Hosp, Dept Anesthesiol & Reanimat, Fac Med, Samsun, Turkey
[4] Univ Hosp Padova, Sect Anesthesiol & Intens Care, Padua, Italy
[5] Hlth Sci Univ Ankara Etlik City Hosp, Dept Pain Med, Ankara, Turkey
[6] Texas Med Ctr, Mem Hermann Hosp, Dept Anesthesiol, Houston, TX USA