function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Berg, C.', 1],
    ['Ehrhorn, Edw. M.', 1],
    ['Evans, Gregory A. & Abd-Rabou, Shaaban', 6],
    ['Fullaway, D. T.', 1],
    ['Gavrilov, Ilya A.', 1],
    ['Gertsson, Carl-Axel & Hodgson, Chris', 2],
    ['Hodgson, Chris', 3],
    ['Kaydan, Mehmet Bora & Benedicty, Zsuzsanna Konczne', 1],
    ['Moghaddam, Masumeh', 3],
    ['Stalažs, Arturs', 2],
    ['Tanaka, Hirotaka', 3],
    ['Williams, D. J.', 1],
    ['Williams, Douglass J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);