function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bowden, John', 2],
    ['Dils, J. & Özbek, H.', 6],
    ['El-Hawagry, Magdi S. & Al Dhafer, Hathal M.', 1],
    ['Greathead, D. J. & Evenhuis, N. L.', 1],
    ['Greathead, David J.', 12],
    ['O’Hara, James E. & Cerretti, Pierfilippo & Pape, Thomas', 1],
    ['Schlüsslmayr, Gerhard', 1],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 1],
    ['Yao, Gang & Evenhuis, Neal L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);