function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fieber, Franz Xaver', 1],
    ['Golub, Viktor B. & Heiss, Ernst', 2],
    ['Guilbert, Eric', 2],
    ['Guilbert, Eric & Cnrs', 1],
    ['Guilbert, Eric & Guidoti, Marcus', 1],
    ['Guilbert, Eric & Heiss, Ernst', 1],
    ['Jepson, James E. & Penney, David & Green, David I.', 2],
    ['Montemayor, Sara & Coscarón, María Del Carmen', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    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);