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Insulin analogues in type 1 diabetes mellitus: getting better all the time. <i>Nat. Rev. Endocrinol.<\/i>, <b>13<\/b>, 385\u2013399 (2017)."},{"key":"2","unstructured":"2) Maiorino MI, Petrizzo M, Capuano A, Giugliano D, Esposito K. The development of new basal insulins: is there any clinical advantage with their use in type 2 diabetes? <i>Expert Opin. Biol. Ther.<\/i>, <b>14<\/b>, 799\u2013808 (2014)."},{"key":"3","doi-asserted-by":"crossref","unstructured":"3) Garber AJ. Will the next generation of basal insulins offer clinical advantages? <i>Diabetes Obes. Metab.<\/i>, <b>16<\/b>, 483\u2013491 (2014).","DOI":"10.1111\/dom.12219"},{"key":"4","unstructured":"4) Moroz E, Matoori S, Leroux JC. Oral delivery of macromolecular drugs: where we are after almost 100 years of attempts. <i>Adv. Drug Deliv. Rev.<\/i>, <b>101<\/b>, 108\u2013121 (2016)."},{"key":"5","doi-asserted-by":"crossref","unstructured":"5) Ismail R, Csoka I. Novel strategies in the oral delivery of antidiabetic peptide drugs\u2014Insulin, GLP 1 and its analogs. <i>Eur. J. Pharm. Biopharm.<\/i>, <b>115<\/b>, 257\u2013267 (2017).","DOI":"10.1016\/j.ejpb.2017.03.015"},{"key":"6","unstructured":"6) Wong CY, Martinez J, Dass CR. Oral delivery of insulin for treatment of diabetes: status quo, challenges and opportunities. <i>J. Pharm. Pharmacol.<\/i>, <b>68<\/b>, 1093\u20131108 (2016)."},{"key":"7","doi-asserted-by":"crossref","unstructured":"7) Karsdal MA, Riis BJ, Mehta N, Stern W, Arbit E, Christiansen C, Henriksen K. Lessons learned from the clinical development of oral peptides. <i>Br. J. Clin. Pharmacol.<\/i>, <b>79<\/b>, 720\u2013732 (2015).","DOI":"10.1111\/bcp.12557"},{"key":"8","unstructured":"8) Al Rubeaan K, Rafiullah M, Jayavanth S. Oral insulin delivery systems using chitosan-based formulation: a review. <i>Expert Opin. Drug Deliv.<\/i>, <b>13<\/b>, 223\u2013237 (2016)."},{"key":"9","unstructured":"9) Koetting MC, Guido JF, Gupta M, Zhang A, Peppas NA. pH-responsive and enzymatically-responsive hydrogel microparticles for the oral delivery of therapeutic proteins: effects of protein size, crosslinking density, and hydrogel degradation on protein delivery. <i>J. Control. Release<\/i>, <b>221<\/b>, 18\u201325 (2016)."},{"key":"10","doi-asserted-by":"crossref","unstructured":"10) Li P, Nielsen HM, Mullertz A. Oral delivery of peptides and proteins using lipid-based drug delivery systems. <i>Expert Opin. 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