This has given rise to various speculation as to mechanisms involved, focusing on an interaction between the gut and the brain. (sciencemediacentre.org)
Dr Fayemi said he was aware of various speculations about whether he would run for the governorship or not. (nigeriapoliticsonline.com)
Amidst various speculations on the state of health of the President, his handlers including the Acting President, Yemi Osinbajo, had insisted that he is hale and hearty. (punchng.com)