51.   Many experts believe that sleep apnea is the culprit behind a significant proportion of several medical conditions, including chronic indigestion, high blood pressure and excessive fatigue.

52.   New research shows that a genetic abnormality causes a significant proportion of spinal disk disease.

53.   Now, some in-depth research into colleges that rely on early decision for a significant proportion of their incoming students is being thrown into the debate.

54.   Plus, studies show that a significant proportion of nits will never become lice.

55.   Qualcomm holds key patents on CDMA technology and eventually would like to generate a significant proportion of its revenue and earnings from licensing that technology to other manufacturers.

56.   The experts had expressed doubts about its effectiveness, questioning its benefit to a significant proportion of recipients.

57.   The prime minister has had to balance this influx of people with a divided population, a significant proportion of whom support or at least feel sympathy for Serbia.

58.   These days, women make up a significant proportion of clergy members in the United Methodist Church, the Evangelical Lutheran Church in America and the Episcopal Church.

59.   A significant proportion of patients fail to respond to conventional treatment.

60.   A significant proportion of hill land on the island is water catchment area and needs protection.