function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aqmal-Naser, Mohamad & Ali, Norsyafira Anis', 1],
    ['Bleeker, Pieter', 1],
    ['Hui, Tan Heok', 5],
    ['Hui, Tan Heok & Ahmad, Amirrudin Bin', 1],
    ['Kottelat, Maurice', 3],
    ['Kottelat, Maurice & Ng, Peter K. L.', 4],
    ['Ng, Casey Keat Chuan & Lim, Teow Yeong & Ahmad, Amirrudin', 4],
    ['Ng, Peter K. L. & Kottelat, Maurice', 3],
    ['Regan, C. T.', 6],
    ['Sulaiman, Zohrah & Hui, Tan Heok & Lim, Kelvin Kok Peng', 2],
    ['Tan, Heok Hui', 6],
    ['Tan, Heok Hui & Kottelat, Maurice', 2],
    ['Tan, Heok Hui & Ng, Peter K. L.', 2],
    ['Tan, Heok Hui & Tan, S. H.', 2],
    ['Vierke, J.', 3],
    ['Other (15)', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=60)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);