For now, argues Lawrence Jacobs of the University of Minnesota, the dispute is only affecting a small minority.

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"Whenever studies are funded by non-pharmacological groups, we find every time that CBT is more effective than sleeping pills, " says Gregg Jacobs of the University of Massachusetts.

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"You could make things more addictive, " says Dr. William Jacobs, an obesity researcher at the University of Florida.

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"We believe in choice, which is the heart of feminism, " says Gloria Jacobs, executive director of the Feminist Press at the City University of New York, who sought opinions on items like Foot Petals and bra-boosters from two of her interns, Tiffany Hervey and Dior Vargas.

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Today such strains show up in the U.S., and current pneumococcal vaccines may not stop them, says Jacobs, now an infectious-disease specialist at Case Western Reserve University.

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This theory, proposed by Jacobs with collaborators at the Salk Institute, and independently by a Yale University team, was inspired by the stunning finding in the 1990s that adults can sprout new brain cells throughout life, contrary to decades of dogma that adult brain cell counts are fixed.

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