function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Blaschke, F.', 3],
    ['Cecca, Fabrizio & Savary, Bérengère', 17],
    ['Fernandez-Lopez, Sixto Rafael & Henriques, Maria Helena', 2],
    ['Moliner, Luis & Olóriz, Federico', 3],
    ['Pandey, Dhirendra Kumar & Fuersich, Franz T. & Alberti, Matthias', 3],
    ['Villasenor, Ana & Olóriz, Federico & González-Arreola, Celestina', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);