function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Handal, Adil Y. & Torstensson, Anders & Wulff, Angela', 1],
    ['Ayres, W. O.', 1],
    ['Basilewsky, S.', 2],
    ['Brown, T.', 1],
    ['Ferreira da Silva, Juliana & Oliveira, Maria Angélica', 1],
    ['Higgins, E. T.', 1],
    ['Joh, Gyeongje', 3],
    ['Kopalová, Kateřina & Zidarova, Ralitsa & Vijver, Bart Van De', 1],
    ['Lai, Giuseppina G. & Ector, Luc & Padedda, Bachisio M.', 1],
    ['Lilljeborg, N.', 1],
    ['Rathke, Martin Heinrich', 1],
    ['Riaux-Gobin, Catherine & Garcia, Marinês & Witkowski, Andrzej', 8],
    ['Richardson, John', 2],
    ['Sherly, Sheena & Radhakrishnan, Cheran', 1],
    ['Storer, D. H.', 2],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);