This article investigates the role of entrepreneurial social and business networks in the internationalization of hightechnology firms. The authors present case study evidence from born-global information and communication technology firms that shows that established and newly formed social networks can be instrumental in exploring internationalization opportunities. These social networks potentially lead to collaborative cooperation and form part of an entrepreneur's broader business network that facilitates exploitation of internationalization opportunities culminated by successful entry into foreign markets. The study incorporates contemporary literature and offers an internationalization opportunity exploration-exploitation model emanating from the entrepreneur's network configuration. In doing so, it takes a process approach and provides much needed qualitative evidence in network research.

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The study aimed to review the literature on the classical risk factors for knee osteoarthritis and their possible role in the development of this pathology in patients with unilateral transtibial amputation in terms of potential rehabilitation prospects. A search of publications was carried out using PubMed databases of the US National Center for Biotechnology Information and the website of the Elsevier publishing house. Well-established increased risk factors for knee osteoarthritis are old age, female gender, lower limb muscle weakness, low or excessive physical activity, overweight, a history of knee joint injury or surgery, chronic knee pain. These factors are common for disabled persons with unilateral transtibial amputation, which, combined with specific mechanical factors, makes these persons more vulnerable to the development and progression of osteoarthritis. Programs aimed at eliminating modifiable risk factors for the development of knee osteoarthritis can contribute to the preservation of knee joint function in the long term and improve the quality of life of persons with unilateral transtibial amputation. This requires the well-coordinated efforts of a multidisciplinary team, as well as the participation of the disabled persons themselves. Identification and management of the potentially modifiable classical risk factors for the development of knee osteoarthritis are one of the promising pathways of rehabilitation of persons with unilateral transtibial amputation.

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Using the ICF, we were able to describe the range and extent of functioning problems experienced by patients with SCI who were admitted in our rehabilitation center. Moreover, the use of the ICF improved the interaction between specialists.