function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Amézquita, Adolfo & Márquez, Roberto & Medina, Ricardo', 1],
    ['Batista, Abel & Jaramillo, César A. & Ponce, Marcos', 1],
    ['Brown, Jason L. & Twomey, Evan & Amézquita, Adolfo', 4],
    ['Chaves-Portilla, Giovanni A. & Salazar, Erika Nathalia', 1],
    ['Higgins, Kathleen & Ibáñez, Roberto', 1],
    ['Márquez, Roberto & Mejía-Vargas, Daniel', 1],
    ['Ovalle-Pacheco, Andrés & Camacho-Rozo, Claudia & Arroyo, Sandy', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);