function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Handal, Adil Y. & Torstensson, Anders & Wulff, Angela', 1],
    ['Chudaev, Dmitry & Jüttner, Ingrid & Vijver, Bart Van De', 1],
    ['Cristina Delgado & M. Helena Novais & Saúl Blanco', 2],
    ['De, Bart Van & Vijver & Mertens, Adrienne & Ector, Luc', 7],
    ['Ferreira da Silva, Juliana & Oliveira, Maria Angélica', 2],
    ['Krahn, Kim J. & Schwarz, Anja & Wetzel, Carlos E.', 6],
    ['Levkov, Zlatko & Williams, David M.', 1],
    ['Morales, Eduardo A. & Novais, Maria Helena & Wetzel, Carlos E.', 1],
    ['Vijver, Bart Van De & Wetzel, Carlos E.', 1],
    ['Vouilloud, Amelia A. & Guerrero, José M. & Morales, Eduardo A.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);