Making First Author Bold in Bibliography

Hello,

The review I am submittings asks that the bibliography have the first author in bold, while the others remain as normal texts. I am using a modified NIH template. Does anyone no how to format a reference so that only the first author is bold?

Also, I am using Endnote x7 on Mac.

Thank you,

Jen

This is not a request that Endnote can automate, as far as I know.  

I was worried about that. Thank you :(