Effects of exercise on bone mass and bone metabolism in adolescents: a systematic review and meta-analysis by Wenhua Zhang, Xiaoqiang Wang, Yurong Liu, Qiang He, Qixin Ding, Jingqi Mei, Xun Li

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Uptake and correlates of modern contraceptive use among women aged 15–49 years in Botswana; evidence from the Botswana demographic survey 2017 by M Keetile, BK Masisi, P Lefadola, M Monnaatsie, T Kgolo, N Swart

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Attributable risk factors for asymptomatic malaria and anaemia and their association with cognitive and psychomotor functions in schoolchildren of north-eastern Tanzania. by Geofrey Makenga, Vito Baraka, Filbert Francis, Daniel T R Minja, Samwel Gesase, Edna Kyaruzi, George Mtove, Swabra Nakato, Rashid Madebe, Sif R Søeborg, Kathrine H Langhoff, Helle S Hansson, Michael Alifrangis, John P A Lusingu, Jean-Pierre Van Geertruyden

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Outdoor light spending time, genetic predisposition and incident Parkinson’s disease: the mediating effect of lifestyle and vitamin D by Yumei Huang, Shufan Tian, Kangli Qiu, Jinchi Xie, An Pan, Gang Liu, Yunfei Liao

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Association of socioeconomic status with diabetic microvascular complications: a UK Biobank prospective cohort study by Yikeng Huang, Zhi Zheng, Haibing Chen, Chufeng Gu

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Perception of quality and adoption of health-preventive measures in gym-goers after the COVID-19 pandemic peak in Italy by L Falese, E Langiano, M Ferrara, P Diotaiuti, A Rodio, T Di Libero, A Andrade, E De Vito

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Associations between mental health conditions in pregnancy and maternal socioeconomic status: a population-based retrospective cohort study in Ontario, Canada by Qun Miao, Gwyneth Zai, Ian Joiner, Jessica Burnside, Mark Walker

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The mediating effect of maternal blood lipids on the association between maternal exposure to PM2.5 and birth weight: a retrospective birth cohort study in Zhejiang, China by Huiqi Chen, Qinqing Chen, Danxiao Wang, Min Lv, Liyun Wang, Yuan Chen, Fangfang Xi, Hefeng Huang, Qiong Luo

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The mediating role of behavioral systems in linking physical activity and anxiety symptoms in college students by Wenli Wang, Hairong Liu

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EDITORIAL by Ivan Čuk

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Exposure to secondhand smoke from cigarettes and secondhand aerosol from tobacco and nicotine products in indoor and outdoor public spaces in the European Union: a cross-sectional... by Anthony A Laverty, Ariadna Feliu, Filippos T Filippidis, Constantine I Vardavas, Cristina Martínez, Charis Girvalaki, Armando Peruga, Charlotte Xin Li, Pin-Chun Wang, Cornel Radu Loghin

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Polarization optical detection and localization of subcutaneous lesions by Xinxian Zhang, Jiahao Fan, Jiawei Song, Nan Zeng, Honghui He, Valery V. Tuchin, Hui Ma

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Hardware-software complex for studying human behavior in conditions of danger by A. Y. Yatskevich, I. G. Shupeyko

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REAL-TIME ALGORITHM of OBJECT TRACKING with ERROR HANDLING by O. P. Solovey, N. N. Ivanov

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ROBUST NUMERICAL METHODS FOR SOLVING THE poorly determined taskS OF ELECTRODYNAMICS AND NONLINEAR DYNAMICS by A. A. Kuraev, T. L. Popkova, V. V. Matveenko

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Transforming the Energy of Vacuum by Using the Oscillator Based on Casimir Effect by A. A. Kurayev, V. V. Matveyenka

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DETECTION OF UNAUTHORIZED USERS OF QUANTUM COMMUNICATION CHANNEL by I. R. Gulakov, A. O. Zenevich, A. M. Timofeev, A. G. Kosari

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Digital filtering of square signals of chains' vector analizers by D. A. Kondrashov, A. V. Gusinsky, A. M. Kostrikin, M. S. Svirid

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Relativistic traveling wave tubes of O-type with sheet electronic beams by A. V. Aksenchyk, I. F. Kirinovich

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OPTIMAL ROUTING INFORMATION FLOWS WITHIN THE PARAMETERS OF QOS by N. I. Listopad, I. O. Velichkevich

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