function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carriol, René-Pierre & Schneider, Simon', 1],
    ['Carrison-Stone, Dana & Syoc, Robert Van & Williams, Gary', 2],
    ['Gray, John Edward', 1],
    ['Kolbasov, Gregory A. & Chan, Benny K. K. & Molodtsova, Tina N.', 2],
    ['Pitriana, Pipit & Jones, Diana S. & Corbari, Laure', 3],
    ['Rosell, Neon', 1],
    ['Say, Thomas', 1],
    ['Shahdadi, Adnan & Sari, Alireza & Naderloo, Reza', 2],
    ['van Syoc, Robert & Carrison-Stone, Dana & Madrona, Liezl', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);