function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abbott, J. F.', 1],
    ['Basilewsky, S.', 1],
    ['Bleeker, Pieter', 5],
    ['Chan, Jeffery C. F. & Tsang, Alphonse H. F. & Yau, Sze-man', 1],
    ['Dybowski, B. I.', 4],
    ['Fowler, Henry Weed', 2],
    ['Ho, Hsuan-Ching & Shao, Kwang-Tsao', 2],
    ['Hora, S. L.', 1],
    ['Kreyenberg, W. & Pappenheim, P.', 1],
    ['Nichols, J. T. & Pope, C. H.', 1],
    ['Oshima, M.', 1],
    ['Sauvage, H. E.', 1],
    ['Tchang, T. - L.', 1],
    ['Yih, P. - L. & Chu, C. - R.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);