function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barrio-Amorós, César L. & Brewer-Carías, Charles', 1],
    ['Duszynski, Donald W. & Bolek, Matthew G. & Upton, Steve J.', 1],
    ['Figueroa, Alex & Low, Martyn E. Y. & Lim, Kelvin K. P.', 1],
    ['Fitzinger, Leopold Joseph Franz Johann', 1],
    ['Hernandez, Tomas & Herr, Mark W. & Stevens, Skyler', 1],
    ['Ovalle-Pacheco, Andrés & Camacho-Rozo, Claudia & Arroyo, Sandy', 1],
    ['Paredes-León, Ricardo & García-Prieto, Luis', 1],
    ['Peralta-García, Anny & Valdez-Villavicencio, Jorge H.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);