1. Department of Neurology, Jefferson Headache Center, Thomas Jefferson University, Philadelphia, PA, USA
2. University of Miami, Department of Neurology, Miami, FL, USA
3. Smell & Taste Center, Department of Otorhinolaryngology, Perelman School of Medicine, University of Pennsylvania, PA, USA
4. Division of Biostatistics, Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, Philadelphia, PA, USA