function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ebejer, Martin J. & Nicolosi, Giuseppe', 1],
    ['El-Hawagry, Magdi S.', 3],
    ['Harym, Younes El & Korneyev, Valery', 2],
    ['Introduction, Iain & Fallén, Lonchaea', 13],
    ['MacGowan, I. & Barták, M.', 6],
    ['Macgowan, Iain', 23],
    ['Macgowan, Iain & Compton, Stephen G.', 1],
    ['Macgowan, Iain & Razak, Nakeer & Rotheray, Graham E.', 2],
    ['Rotheray, Graham & Lyszkowski, Richard', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=52)',
    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);