function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Feng & He, Hai', 1],
    ['Gibbs, Lilian Suzette', 1],
    ['Lin, Yun & Bi, Hai-Yan & Sun, Jun & Sun, Qian', 4],
    ['Mez, Carl Christian', 1],
    ['Ridley, Henry Nicholas', 1],
    ['Royen, Pieter van', 1],
    ['Schmid, Maurice', 2],
    ['Sleumer, Hermann Otto', 8],
    ['Sumanon, Pirada & Eiserhardt, Wolf L. & Balslev, Henrik', 6],
    ['Utteridge, Timothy Michael Arthur', 1],
    ['White, J.', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);