Influence of microgravity on astronauts' sympathetic and vagal responses to Valsalva's manoeuvre.
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Cox JF, et al. Among authors: robertson rm, robertson d.
J Physiol. 2002 Jan 1;538(Pt 1):309-20. doi: 10.1113/jphysiol.2001.012574.
J Physiol. 2002.
PMID: 11773338
Free PMC article.