Article Information
- Received September 4, 1998
- Revision received February 16, 1999
- Accepted February 18, 1999
- First published May 1, 1999.
- Version of record published May 1, 1999.
Author Information
Author contributions
Disclosures
- Received September 4, 1998.
- Revision received February 16, 1999.
- Accepted February 18, 1999.
This work was supported by grants from the Fundación Ramón Areces, Comision Interministerial de Ciencia y Tecnologia Grants PM95–0019 and SAF-0031, and Comunidad de Madrid. We acknowledge Drs. Javier de Felipe and Carlos Avendaño for helpful discussions and interpretation of results, Drs. Reinoso-Suarez and Perez Marquez for their valuable help in the preparation of the figures, Fernando Nuñez and Pablo Señor for the care of animals, Maria Teresa Fernandez for art work, and Gloria Chacón for technical help.
A.G.-F. is the recipient of a contract, and M.J.E. is the recipient of a predoctoral fellowship from the Ministry of Education and Culture, and both have contributed equally.
Correspondence should be addressed to Dr. Juan Bernal, Instituto de Investigaciones Biomédicas, Arturo Duperier 4, 28029 Madrid, Spain.
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