Is there a correct or preferred point (aliyah) during the Shabbat Torah reading at which the traditional "mi shebeirach lecholim" prayer for the sick should be recited by the gabbai?
If such a preferred point in the Torah reading exists, what is the reason for the mishebeirach lecholim prayer to be recited at this particular position?
My experience is that in many shuls the custom is for the mishebeirach lecholim to be recited immediately following the mishebeirach for the 6th aliyah. However, I am unable to find a reason or source for this practice.