New 2009 Impact Factors Soar for Newest Cell Press Journals

Impressive Increases for Cell Stem Cell and Cell Host and Microbe Rankings; Cell Remains Top Journal in its Field

CAMBRIDGE, Massachusetts, June 21, 2010 - In the year since their 2008 preliminary ranking, Cell Press journals
Cell Stem Cell and Cell Host and Microbe saw their Impact Factors surge,
according to new data released in the 2009 Journal Citation Reports(c)
published by ThomsonReuters.

In the report released June 17, Cell Stem Cell's rating rose to 23.563 -
a growth of 40% from the journal's previous score. Cell Host and Microbe
ranks 13.021 - boasting an increase of 75% from the journal's 2008 Impact
Factor.

Cell, the flagship journal of Cell Press, an imprint of Elsevier, remains
the number one research journal in the Cell Biology and Biochemistry &
Molecular Biology subject categories, with an Impact Factor of 31.152.

"We are thrilled to see our two youngest journals spur such incredible
growth in 2009," said Emilie Marcus, editor-in-chief of Cell Press. "We are
proud of the work all of our publications contribute to the scientific
community, and grateful to our authors and reviewers who help make this
possible."

The ranking also reveals that Cancer Cell continues to grow with a 2009
rating of 25.288. Molecular Cell saw an impressive 13% increase to 14.608,
and The American Journal of Human Genetics, a Society journal within the Cell
Press publishing portfolio, saw its Impact Factor jump 21% in 2009 to 12.303.

The 2009 Journal Citation Reports(c) ranks the Cell Press journals'
Impact Factors as follows: Cancer Cell (25.288), Cell (31.152), Immunity
(20.589), Current Biology (10.992), Structure (5.904), Molecular Cell
(14.608), Cell Metabolism (17.35), Cell Stem Cell (23.563), Cell Host and
Microbe (13.021), Chemistry and Biology (6.523), Neuron (13.26),
Developmental Cell (13.363), Trends in Biochemical Sciences (11.572), Trends
in Cognitive Sciences (11.664), Trends in Genetics (8.689), Trends in
Microbiology (6.894), Trends in Molecular Medicine (11.049), Trends in
Neuroscience (12.974), Trends in Plant Science (9.883), Trends in
Biotechnology (6.909), Trends in Cell Biology (12.115), Trends in Ecology and
Evolution (11.564), Trends in Endocrinology and Metabolism (6.562), Trends in
Immunology (8.768), Trends in Parasitology (4.298), Trends in Pharmacological
Sciences (9.064), and Society Journals, American Journal of Human Genetics
(12.303), and Biophysical Journal (4.39).

The Impact Factor is a measure of the frequency with which the average
article in a journal has been cited in a particular year. The Impact Factor
helps to evaluate a journal's relative importance, especially when compared
with others in the same field.

For more information about Cell, Cell Press, and its group of scientific
journals, please log on to www.cell.com.

About Cell Press

Cell Press, an imprint of Elsevier, is committed to improving scientific
communication through the publication of exciting research and reviews. Each
of our titles is viewed as a must-read by the scientific community it serves.
Cell Press primary research journals include the flagship journal Cell, as
well as Neuron, Immunity, Molecular Cell, Developmental Cell, Cancer Cell,
Current Biology, Structure, Chemistry & Biology, Cell Metabolism, Cell Host &
Microbe, Cell Stem Cell, and, new to Cell Press, Biophysical Journal, and The
American Journal of Human Genetics. Cell Press also publishes the Trends
family of reviews journals, including Trends in Cell Biology, Trends in
Neurosciences, and Trends in Cognitive Sciences. (www.cell.com).

About Elsevier

Elsevier is a world-leading publisher of scientific, technical and
medical information products and services. The company works in partnership
with the global science and health communities to publish more than 2,000
journals, including The Lancet (www.thelancet.com) and Cell
(www.cell.com), and close to 20,000 book titles, including major
reference works from Mosby and Saunders. Elsevier's online solutions include
ScienceDirect (www.sciencedirect.com), Scopus (www.scopus.com),
Reaxys (www.reaxys.com), MD Consult (www.mdconsult.com) and
Nursing Consult (www.nursingconsult.com), which enhance the
productivity of science and health professionals, and the SciVal suite
(www.scival.com) and MEDai's Pinpoint Review (www.medai.com),
which help research and health care institutions deliver better outcomes
more cost-effectively.

A global business headquartered in Amsterdam, Elsevier (
www.elsevier.com) employs 7,000 people worldwide. The company is part
of Reed Elsevier Group PLC (www.reedelsevier.com), a world-leading
publisher and information provider, which is jointly owned by Reed Elsevier
PLC and Reed Elsevier NV. The ticker symbols are REN (Euronext Amsterdam),
REL (London Stock Exchange), RUK and ENL (New York Stock Exchange).

    Contact:

    Cathleen Genova | Press Officer
    Cell Press
    +1-617-397-2802 (office) | cgenova@cell.com

Contact: Cathleen Genova, Press Officer, Cell Press, +1-617-397-2802 (office), cgenova at cell.com