function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barra, Jean-Auguste', 1],
    ['Cipola, Nikolas Gioia & Greenslade, Penelope', 3],
    ['Jantarit, Sopark & Bedos, Anne & Deharveng, Louis', 13],
    ['Jantarit, Sopark & Surakhamhaeng, Katthaleeya & Deharveng, Louis', 3],
    ['Surakhamhaeng 1, Katthaleeya & Deharveng 2, Louis', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);