| http://www.w3.org/ns/prov#value | - Alternatively, the duration of the stimulation and rest periods are expressed in units of time, and each of the rest periods has a duration of at least 30 seconds, e.g., such as at least one minute, at least two minutes, at least five minutes, or at least 25 minutes, and each of the stimulation periods has a duration of at least 10 minutes, e.g., at least 30 minutes, such as at least one hour, and
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