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Medicine (United States), ISSN 0025-7974, 05/2016, Volume 95, Issue 21
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Medicine (United States), ISSN 0025-7974, 05/2015, Volume 94, Issue 21
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Astronomical Journal, ISSN 0004-6256, 04/2003, Volume 125, Issue 4, pp. 2276 - 2286
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Medicine (United States), ISSN 0025-7974, 07/2015, Volume 94, Issue 27, p. e1097
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Medicine (United States), ISSN 0025-7974, 06/2015, Volume 94, Issue 22, p. e952
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Medicine (United States), ISSN 0025-7974, 12/2014, Volume 93, Issue 27
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Medicine (United States), ISSN 0025-7974, 04/2016, Volume 95, Issue 14
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Medicine (United States), ISSN 0025-7974, 04/2016, Volume 95, Issue 15
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Anuario de Psicologia, ISSN 0066-5126, 01/2018, Volume 48, Issue 1, pp. 9 - 17
Observational studies that use a combination of complementary methods can provide key insights into everyday behavior in natural settings. Many elements of... 
Observational sampling | Observational data analysis | Quality of observational record | Observational instrument | Recording | Observational design
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Medicine (United States), ISSN 0025-7974, 04/2016, Volume 95, Issue 14
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Medicine, ISSN 0025-7974, 05/2015, Volume 94, Issue 17, p. e755
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Medicine (United States), ISSN 0025-7974, 04/2016, Volume 95, Issue 15
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