Calibration of an Item Pool for Assessing the Burden of Headaches: An Application of Item Response Theory to the Headache Impact Test (HIT™)
| Autor: | Bjorner, Jakob B., Kosinski, Mark, Ware,, John E. |
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| Zdroj: | Quality of Life Research, 2003 Dec 01. 12(8), 913-933. |
| Databáze: | JSTOR Journals |
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