et al and the use of a comma

Dear Sir / Madam, I feel I am fairly competent with the use of the CSL editor but I can not find a way to omit the use of comma when et al. is in use for inline references. I currently have: (Blogs et al., 2014) but I would like: (Blogs et al. 2014) It is important that the comma stays there for references that are like the following: (Blogs & Blogs, 2014). The link to my reference style is below: http://csl.mendeley.com/styles/17215201/the-journal-of-physiology-4 Thank you, Matt