function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Böttger-Schnack, Ruth', 8],
    ['Cho, Kyuhee & Böttger-Schnack, Ruth & Kim, Woong-Seo', 5],
    ['Cho, Kyuhee & Kim, Woong-Seo & Böttger-Schnack, Ruth', 6],
    ['Cho, Kyuhee & Park, Chailinn & Boettger-Schnack, Ruth', 3],
    ['Dana, James Dwight', 1],
    ['Juan M. Fuentes-Reinés & Eduardo Suárez-Morales', 2],
    ['Pugh, P. J. A. & Dartnall, H. J. G. & McInnes, S. J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);