Retin-A and EGF drops and serum together?

Hello. I was given EGF drops and serum to use in the morning and evenings. I am already using Retin-a 0,05% but I also really want to use the EGF products because I heard wonders about it. Can I use it with my Retin-a cream ? If I can in what order should I use it? Thank you and best regards...

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