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- springer science and business media llc8
- wiley7
- elsevier bv3
- cell press2
- oxford university press2
- springer verlag germany:tiergartenstrasse 17, d 69121 heidelberg germany:011 49 6221 3450, email: g.braun@springer.de, internet: http://www.springer.de, fax: 011 49 6221 3452292
- academic press incorporated:6277 sea harbor drive:orlando, fl 32887:(800)543-9534, (407)345-4100, email: ap@acad.com, internet: http://www.idealibrary.com, fax: (407)352-34451
- bmj1
- bmj publishing group1