1 Correction

Following publication of the original article [1], the authors identified that the third affiliation in the author list is incorrect, it should be ‘Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam.’ rather than ‘Faculty of Mathematics and Statistics, Ton Duc Thang University, Universitas Airlangga, 60115 Ho Chi Minh City, Vietnam.’ The original paper has been updated.