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1 - As a result of both extensive research efforts and practical application of these technologies, considerable insight has been gained into their design

2 - The extensive survey of 10,000 Americans is the largest study of U.S. political attitudes ever undertaken by Pew.

3 - Identification of treatments and outcome measures in rare diseases is a very cumbersome task involving extensive studies.

4 - The childhood and long-term effects of excessive parental absence can range from moderate to severe, depending on a child's age, gender, their bond with the absent adult, and their extended family's nurturance level.

5 - As Congress debates the need for more extensive health care programs, protesters from both sides of the argument have gathered outside the Capitol Building to voice their opinions.