function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beier, Max', 4],
    ['Chamberlin, Joseph Conrad', 2],
    ['Díaz, René Barba & Zaragoza, Juan A. & Iborra, Germán López', 3],
    ['Muchmore, William B.', 21],
    ['Perez-Gelabert, Daniel E.', 1],
    ['Reboleira, Ana Sofia P. S. & Zaragoza, Juan A.', 3],
    ['Romero-Ortiz, Catalina & García, Fabian & Villarreal, Eduardo', 2],
    ['Viana, Ana Clara M. & Ferreira, Rodrigo L.', 4],
    ['Viana, Ana Clara M. & Souza, Maysa F. V. R.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=42)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);