“Disconcertingly, however, many of the aetiological questions asked over 150 years ago are still unanswered.”

“Next in importance were aetiological research and societal research projects.”

“While animal studies have suggested an aetiological role for high fat intake in colorectal carcinogenesis, such evidence is very hard to extrapolate to humans living freely.”

“The etiologic agent in respiratory system injury caused by organic dusts is unclear.”

“Numerous investigators have studied the etiologic pathogens associated with otitis media in children.”

“Most etiologic studies of sarcoidosis have used an epidemiologic approach, but the disease poses particular difficulties.”

“Because of the many etiological factors involved, multifactorial diseases are not, strictly speaking, the sole result of hereditary transmission.”

“Coccidioides spp. are the etiological agents of the human respiratory disease known as coccidioidomycosis or San Joaquin Valley fever.”

“Rapid etiological diagnosis will help in timely institution of specific therapy.”