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102Article of journalPublished in 2014Repositorio Biblioteca Digital Universidad Externado de Colombia
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103BookPublished in 2014Repositorio Repositorio Institucional ECI
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107articlePublished in 2004Repositorio Repositorio Universidad Javeriana“... companies are Bupa, PPP and WPA. Insurers have focused their cost containment efforts on reducing provider...”
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108Article of journalPor Perez Sanchez, Amaury; Ranero-González, Elizabeth; Pérez-Sánchez, Eddy J.; Segura-Silva, Rutdali MariaPublished in 2020Repositorio Repositorio EIA .
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113http://purl.org/coar/version/c_b1a7d7d4d402bccePublished in 2018Repositorio Repositorio UIS
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118Article of journalPublished in 2017Repositorio Repositorio Institucional U. Caldas
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