Aristolochia serpentaria (Virginia snakeroot), Aristolochia reticulata (Texas snakeroot) and in Chinese herbs such as Aristolochia fangchi and Aristolochia mandshurensis (banned in China and withdrawn from Chinese Pharmacopoea 2005; Stephania tetrandra and Magnolia officinalis do not contain aristolochic acid).
age-based rationing. Age-Based Rationing. A proposed form of rationing publicly-funded health care services, in which limits would be placed on the type and amount of such services that would be freely available to persons above a certain age.
Placement Ratio. DEFINITION of 'Placement Ratio'. A ratio that calculates the amount of bonds sold during the week as a percentage of the amount of municipal bonds that are issued during the corresponding week. Only issues of $1,000,000 par value or more are used in the calculation. Also known as the acceptance ratio.