1. Gender Differences in Hiccup Patients: Analysis of Published Case Reports and Case- Control Studies 
Gyeong-Won Lee, MD, Rock Bum Kim, MD, Se Il Go, MD, Hyun Seop Cho, MD, Seung Jun Lee, MD, David Hui, MD, MSc, Eduardo Bruera, MD, Jung Hun Kang, MD 
Journal of Pain and Symptom Management 
Volume 51, Issue 2, Pages (February 2016)
DOI: /j.jpainsymman
Copyright © 2016 American Academy of Hospice and Palliative Medicine Terms and Conditions

2. Fig. 1 Flow diagram of study selection.
Journal of Pain and Symptom Management  , DOI: ( /j.jpainsymman )
Copyright © 2016 American Academy of Hospice and Palliative Medicine Terms and Conditions

3. Fig. 2
Event rate by gender in non-CNS originated hiccups. CNS = central nervous system.
Journal of Pain and Symptom Management  , DOI: ( /j.jpainsymman )
Copyright © 2016 American Academy of Hospice and Palliative Medicine Terms and Conditions