Botox in Columbia, Missouri - Dermatologist Recommendations?

Hello - Can anyone suggest a dermatologist in Columbia, Missouri who performs Botox and is highly recommended from experience? I am looking to receive my first Botox injections for 'scowl lines' between my eyebrows. I've been doing my research - and I think I've decided to go ahead with it. Please let me know of someone local - and any tips/experiences you may have had. Thank you!