1. Dose standardisation of botulinum toxin;Quinn;Lancet,1989
2. Dose standardisation of botulinum toxin;Schantz;Lancet,1990
3. Botulinum toxin: dangerous terminology errors;Brin;JR Soc Med,1993
4. Author's reply;Marsden;J R Soc Med,1993
5. P. Hambleton, AM. Pickett, Potency equivalence of botulinum toxin preparations, J R Soc Med ((in press)).