<p>Preface <br>Gregory S Makowski </p><p>1. Glycosaminoglycans in mucopolysaccharidoses and other disorders </p><p>Shaukat A Khan, Fnu Nidhi, Andrés Felipe Leal, Betul Celik, </p><p>Angelica María Herreño-Pachón, Sampurna Saikia, Eliana Benincore-Flórez, Yasuhiko Ago and Shunji Tomatsu </p><p>2. Volatile organic compounds in cancer and exhaled breath detection technology </p><p>Xinyuan Zhou, Manqing Qi, Mingqi Tang, Shifang Wen, Zhenjie Xue and Tie Wang </p><p>3. Cardiac Natriuretic Peptides </p><p>Theodor W. Shalmi, Anne Sophie B. Jensen, and Jens P. Goetze </p><p>4. Long non-coding and circular RNAs in osteoporosis: translation to clinical practice </p><p>Martina Faraldi, Paola Maroni, Marta Gomarasca, Veronica Sansoni, Giuseppe Banfi, and Giovanni Lombardi </p><p>5. Sputum proteomics in lung disorders </p><p>Paolo Iadarola, Maura D’Amato, Maria Antonietta Grignano, and Simona Viglio </p><p>6. PTSD Biomarkers: Neuroendocrine Signaling to Epigenetic Variants </p><p>Alyssa Sbisa, Kristin Graham, Ellie Lawrence-Wood, Alexander C McFarlane, and <br>Catherine Toben </p>