How much sleep do we need?☆
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☆ Correspondence should be addressed to: Michele Ferrara, Ph.DDipartimento di Psicologia, Università degli Studi di Roma “La Sapienza”, Via dei Marsi, 78; 00185 Rome, Italy. Fax: +39 06 44 51 667; E-mail: michele.ferrara@uniroma
PII: S1087-0792(00)90138-2
doi:10.1053/smrv.2000.0138
© 2001 Harcourt Publishers Ltd. All rights reserved.
