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Eog Bilder ❘ Science Photo Library
12030905 - Polygraph Tracings of REM Sleep
11863930 - Sleep research: various traces of REM sleep
11863924 - Sleep research: various traces of stage 1 sleep
12030903 - Polygraph Tracings of REM Sleep
11863929 - Sleep research: various traces of REM sleep
11638916 - Paediatric sleep study
12030904 - Polygraph Tracings of REM Sleep
12016724 - Sleep Study Patient
11863927 - Sleep research: various traces of stage 4 sleep
11638917 - Paediatric sleep study
12016882 - Polysomnograph
11863925 - Sleep research: various traces of stage 2 sleep
12016842 - Polysomnogram (Sleep Research)
11638918 - Paediatric sleep study
11863926 - Sleep research: various traces of stage 3 sleep
12016655 - Sleep Research
11863928 - Sleep research: various traces of REM sleep
11638947 - Paediatric sleep study demonstration doll
11863923 - Sleep research: various traces of subject awake
11638920 - Paediatric sleep study
12016841 - Polysomnograph
11638914 - Paediatric sleep study
11638919 - Paediatric sleep study
12013399 - Polygraph Tracings of REM Sleep
12016656 - Sleep Research
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