function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chan, Jeffery C. F. & Tsang, Alphonse H. F. & Yau, Sze-man', 2],
    ['E Zhang & Yi-Yu Chen', 1],
    ['Fang, P. - W.', 1],
    ['Fowler, Henry Weed', 1],
    ['Ho, Hsuan-Ching & Shao, Kwang-Tsao', 1],
    ['Hui, Tan Heok & Peng, Kelvin Lim Kok & Huan, Liew Jia', 1],
    ['Jerdon, T. C.', 1],
    ['McClelland, J.', 1],
    ['Roberts, Tyson R.', 1],
    ['Sauvage, H. E.', 3],
    ['Srivastava, G. J.', 1],
    ['Çiçek, Erdoğan & Fricke, Ronald & Eagderi, Soheil', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=17)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);