Masaki, your advice is the best. Thanks for the expert information, especially about "the artistic aspect," which makes so much sense.
On the other hand, a little bit of knowledge can be a dangerous thing. Since I know very little about the subject, I should edit my post to say. "Lots of options, do your research and check everything out thoroughly."
Thank goodness my article didn't debate the benefits of botox vs restylane. I'd be in big trouble with my editor.