Our results suggest that HH has a greater effect on nocturnal breathing and sleep structure than NH. In HH, we observed more periodic breathing, which might arise from the lower saturation due to hypobaria, but needs to be confirmed. < /p > < /div > < div class="section" > < a name="d7e223" > < !-- named anchor -- > < /a > < h3 class="section-title" > Citatio..."> Our results suggest that HH has a greater effect on nocturnal breathing and sleep structure than NH. In HH, we observed more periodic breathing, which might arise from the lower saturation due to hypobaria, but needs to be confirmed. < /p > < /div > < div class="section" > < a name="d7e223" > < !-- named anchor -- > < /a > < h3 class="section-title" > Citatio..." /> Our results suggest that HH has a greater effect on nocturnal breathing and sleep structure than NH. In HH, we observed more periodic breathing, which might arise from the lower saturation due to hypobaria, but needs to be confirmed. < /p > < /div > < div class="section" > < a name="d7e223" > < !-- named anchor -- > < /a > < h3 class="section-title" > Citatio..." />