function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Banyal, Harinder Singh & Kumar, Sanjeev', 1],
    ['Batuwita, Sudesh & De Silva, Madura & Udugampala, Sampath', 3],
    ['Bleeker, Pieter', 1],
    ['Conway, Kevin W. & Mayden, Richard L. & Tang, Kevin L.', 1],
    ['Dybowski, B. I.', 2],
    ['Fang, Fang & Kullander, Sven O.', 1],
    ['Ikhwanuddin, Mat Esa Mohd & Amal, Mohammad Noor Azmai', 1],
    ['Kottelat, Maurice', 1],
    ['Kullander, Sven & Norén, Michael', 2],
    ['Kullander, Sven O.', 2],
    ['Ng, Casey Keat Chuan & Lim, Teow Yeong & Ahmad, Amirrudin', 1],
    ['Ramananda, Yumnam & Vishwanath, Waikhom', 1],
    ['Çiçek, Erdoğan & Fricke, Ronald & Eagderi, Soheil', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);