function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aqmal-Naser, Mohamad & Ali, Norsyafira Anis', 1],
    ['Bànàrescu, P. M.', 1],
    ['Ciccotto, Patrick J.', 1],
    ['Conway, Kevin W.', 1],
    ['Duncker, G.', 1],
    ['E Zhang & Maurice Kottelat', 1],
    ['Fowler, Henry Weed', 1],
    ['Hui, Tan Heok & Peng, Kelvin Lim Kok & Huan, Liew Jia', 1],
    ['Ikhwanuddin, Mat Esa Mohd & Amal, Mohammad Noor Azmai', 1],
    ['Kottelat, Maurice', 1],
    ['Kottelat, Maurice & Hui, Tan Heok', 1],
    ['Liang, L. & Liu, C. - X. & Wu, Q. - L.', 1],
    ['Menon, A. G. K. & Jacob, P. C.', 1],
    ['Ng, Casey Keat Chuan & Lim, Teow Yeong & Ahmad, Amirrudin', 2],
    ['Pellegrin, J. & Chevey, P.', 1],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);