function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fang, P. - W.', 1],
    ['H. H. Tan & C. U. M. Leh', 7],
    ['H. H. Tan & Z. H. Sulaiman', 7],
    ['Inger, R. F. & Chin, P. K.', 3],
    ['Leh, M. U. C. & Chai, P. K. P.', 1],
    ['Mai, D. Y.', 1],
    ['Rachmatika, I.', 1],
    ['Roberts, Tyson R.', 3],
    ['Sulaiman, Zohrah & Hui, Tan Heok & Lim, Kelvin Kok Peng', 5],
    ['Wilkinson, Clare L. & Hui, Tan Heok', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);