Media type: E-Article Title: Standardized tests of heart rate variability: normal ranges obtained from 309 healthy humans, and effects of age, gender, and heart rate Contributor: Agelink, Marcus W.; Malessa, Rolf; Baumann, Bruno; Majewski, Thomas; Akila, Frank; Zeit, Thomas; Ziegler, Dan imprint: Springer Science and Business Media LLC, 2001 Published in: Clinical Autonomic Research Language: English DOI: 10.1007/bf02322053 ISSN: 0959-9851; 1619-1560 Origination: Footnote: