tronar
En 1975, el Dr. Robert L. Swezey y Struart E. Swezey realizaron un estudio de 28 residentes de asilos quienes podían recordar si se habían tronado o no los nudillos previamente en la vida. | In 1975, Dr. Robert L. Swezey and Stuart E. Swezey conducted a study of 28 nursing home residents who could recall whether or not they had cracked their knuckles earlier in life. |
