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McClearn GE, Johansson B, Berg S, Pedersen NL, Ahern F, Petrill SA, Plomin R.McClearn GE, et al. Among authors: johansson b.Science. 1997 Jun 6;276(5318):1560-3. doi: 10.1126/science.276.5318.1560.Science. 1997.PMID: 9171059
Haynie DA, Berg S, Johansson B, Gatz M, Zarit SH.Haynie DA, et al. Among authors: johansson b.J Gerontol B Psychol Sci Soc Sci. 2001 Mar;56(2):P111-8. doi: 10.1093/geronb/56.2.p111.J Gerontol B Psychol Sci Soc Sci. 2001.PMID: 11245358
Pedersen NL, Gatz M, Berg S, Johansson B.Pedersen NL, et al. Among authors: johansson b.Ann Neurol. 2004 Feb;55(2):180-5. doi: 10.1002/ana.10999.Ann Neurol. 2004.PMID: 14755721