Lim, R., Rawlings, A., Schultz, S., Bradley, L., Hammad, H., & Bechtold, M. Unusual cause of constipation: sunflower seeds bezoar. Endoscopy, 45 Suppl 2 UCTN, E46. https://doi.org/10.1055/s-0032-1325893 (Original work published 2013)

Censani, M., Hammad, H., Christos, P., & Schumaker, T. Vitamin D Deficiency Associated With Markers of Cardiovascular Disease in Children With Obesity. Global Pediatric Health, 5, 2333794X17751773. https://doi.org/10.1177/2333794X17751773 (Original work published 2018)