function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akbulatova, L. Kh.', 1],
    ['Csokor, Johann', 1],
    ['Izdebska, Joanna N.', 1],
    ['Kadulski, Sławomir & Izdebska, Joanna N.', 1],
    ['Ma, Min & Li, Sheng-Cai & Fan, Qing-Hai', 3],
    ['Owen, Richard', 1],
    ['Reeves, Will K. & Durden, Lance A. & Ritzi, Christopher M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);