“…Biobibliometric analysis has been performed in various medical fields, such as stem cell (Cantos-Mateos et al, 2012;Ho, Chiu, Tseng, & Chiu, 2003), spine (Ding, Jia, & Liu, 2016), cardiovascular disease (Al-Kindi et al, 2015;Huffman et al, 2013;Ugolini et al, 2013), chronic obstructive pulmonary disease (COPD; Gu et al, 2015), rheumatism (Cheng & Zhang, 2013), diabetes (Krishnamoorthy, Ramakrishnan, & Devi, 2009;Sweileh, Sa'ed, Al-Jabi, & Sawalha, 2014), Severe Acute Respiratory Syndrome (SARS; Rodrigues et al, 2000), small cell lung cancer (SCLC; Ho et al, 2013), and Alzheimer's disease (AD; Chen et al, 2014). Li et al (2008) explained exponentially growing PD trends, between 1991 and 2006, based on the WoS database, including productivity and international collaboration by analyzing citations and author-provided keywords.…”