function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dennis, D. Steve & Barnes, Jeffrey K.', 4],
    ['Dennis, D. Steve & Barnes, Jeffrey K. & Knutson, Lloyd', 6],
    ['Ghahari, H. & Havaskary, M. & Tabari, M. & Ostovan, H.', 2],
    ['Ghahari, H. & Hayat, R. & P. A & Lavigne, R. & Ostovan, H.', 4],
    ['Lavigne, Robert J. & Dennis, D. Steve', 10],
    ['Lavigne, Robert J. & Dennis, Steve', 12],
    ['Sakenin, H. & Samin, N. & Ghahari, H. & Imani, S. & Rastgari, J.', 1],
    ['Sakhvon, V. V.', 1],
    ['Schlüsslmayr, Gerhard', 3],
    ['Young, Charles L.', 3],
    ['Żóralski, Robert & Kowalczyk, Jan Krzysztof', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);