function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Diels, Friedrich Ludwig Emil', 1],
    ['Hoogland, Ruurd Dirk', 1],
    ['Kanehira, Ryozo & Hatusima, Sumihiko', 1],
    ['Kobuski, Clarence Emmeren', 5],
    ['Lauterbach, Carl (Karl) Adolf Georg', 2],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 1],
    ['Lin, Yun & Bi, Hai-Yan & Sun, Jun & Sun, Qian', 2],
    ['Martinetto, Edoardo & Bertini, Adele & Mantzouka, Dimitra', 1],
    ['Royen, Pieter van', 10],
    ['Suh, Soo-Jung', 4],
    ['White, J. & Francis, George William', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=29)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);