function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calder, Dale R.', 4],
    ['Degawa, Yousuke & Hosoya, Tsuyoshi & Hosaka, Kentaro', 1],
    ['Filippova, Nina & Zvyagina, Elena & Rudykina, Elena', 1],
    ['Haelewaters, Danny & Filippova, Nina V. & Baral, Hans-Otto', 2],
    ['Johnston, Peter R. & Park, Duckchul & Baral, Hans-Otto', 10],
    ['Li, Cui-Jin-Yi & Thilini Chethana, Kandawatte Wedaralalage', 5],
    ['Wei, De-Ping & Gentekaki, Eleni & Wanasinghe, Dhanushka N.', 2],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);