function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Beck, L. & Woas, S.', 1],
    ['Bolger, Thomas', 1],
    ['Colloff, Matthew J.', 35],
    ['Colloff, Matthew J. & Perdomo, Giselle', 8],
    ['Hushtan, Habriel H. & Hushtan, Kateryna V. & Glotov, Sergii V.', 2],
    ['Kun, Marcelo E. & Martínez, Pablo A. & Gonzalez, Alda', 2],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 28],
    ['Lochyńska, Malgorzata', 2],
    ['Norton, Roy A. & Ermilov, Sergey G.', 6],
    ['Oliveira, Anibal R. & Argolo, Poliane S. & De, Gilberto J.', 2],
    ['Revelo-Tobar, Harol', 8],
    ['Schatz, Heinrich', 2],
    ['Schatz, Heinrich & Fortini, Lorenzo & Fusco, Tommaso', 2],
    ['Sellnick, M. & Forsslund, K. - H.', 17],
    ['Łochyńska, Małgorzata', 2],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=125)',
    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);