function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bulnes, Veronica N. & Faubel, Anno & Ponce de Leon, Rodrigo', 3],
    ['Cuadrado, Daniel & Rodríguez, Jorge & Moro, Leopoldo', 1],
    ['Faubel, Anno', 1],
    ['Gammoudi, Mehrez & Bulnes, Verónica N. & Kurt, Güley', 1],
    ['Marquina, Daniel & Osca, David & Rodríguez, Jorge', 2],
    ['Noreña, Carolina', 2],
    ['Noreña, Carolina & Rodríguez, Jorge & Pérez, Jacinto', 1],
    ['Soutullo, Patricia & Cuadrado, Daniel & Noreña, Carolina', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    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);